CODEWITHSUNDEEP
gdb
my_question
my_question

Reputation: 3235

How to automatically print the values of just updated variables

I know this could be a pipe dream, just throw it here.

So here is the code:

int f()
{
  int i = 0;
  int j = 0;

  for (; i < 10 && j < 100; ++i, j = i * 2) {
    i = f2();
  }
}

So when it comes to function f(), I can run "disp i j" and then after each single line step over, the values of i and j print out. It works fine.

But is there a global setting or some trick so that, I do not need to type the "display" command, all local variables are automatically printed AND they are printed only when their values are updated.

Another words, at the line i = f2(), the value of j does not print.

Upvotes: 0

Views: 342

Answers (1)

The Philomath
The Philomath

Reputation: 992

You can set the watchponits on i and j. Like this

(gdb) watch i

It will automatically print the value of i whenever value of i changes

You can also print the value based upon some condition using if<condition>. Like this

(gdb) watch i if j==4

For me there is no issue in printing the value of j at i = f2(); line.

Upvotes: 1

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